it cuts both ways
The recent cataclysms and news of the wolf hunt disturb Elwe Thingol deeply. He is concerned about his daughter and her family dwelling out in the woods. He muses to himself that there might be a way to help Luthien and perhaps find himself in her good graces again. An idea sparks in his mind. Relishing the thoughts he hurries to the smithy. He tells them to craft a dagger out of the precious metal mithril. On the pommel of the dagger, he requests that two nightingales be crafted and set with a sapphire. On the blade itself were engraved in the elvish script the words "dusk singer"
When the work is completed, he looks at the weapon pleasingly. He calls to his manservant to deliver the dagger to Luthien in the forest with this note.


My beloved daughter,
I know we have been unfriends as of late. I know I cannot do anything to alter this situation. However the recent disasters inflicted by the Valar are of grave concern, as well as the wolves spotted in the forest. The kingdom of Doriath grows more dangerous. I realize that Beren and Dior are more then capable of defending you and themselves. Yet in the event that you must defend yourself or the twins, I bequeath to you this gift. I know you shall use it wisely.
Your loving father,
Elwe Thingol

He hands the letter and dagger to his page, who sets off to bring the gift to Luthien.